Hello Hercules and Korkut

[meltemi]

Hoping you don't see it as a meddling, I suggest to look at this photo from Bulent Atalay (an expert about Leonardo).
Hugs to both of you! Stella

http://www.trekearth.com/gallery/photo521840.htm

[Cretense]

Geia sou Stella!

Thank you so much for your help and the link! The problem is that even in Bulent's note it isn't very clear if Leonardo had in mind a bridge crossing the Golden Horn or the Bosphorus. Maybe, we 'll have to ask Bulent directly.

Ciao, Hercules